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LOGO! Manual
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4.3.1 Description of the Inputs
Connection inputs
The connections that can be made to other blocks or to the
inputs of the LOGO! device are described here.
S (set):
The input S allows you to set the output to “1”.
R (reset):
The reset input R takes priority over all other inputs and
switches outputs to “0”.
Trg (trigger):
You use this input to start the execution of a function.
Cnt (count):
This input records count pulses.
Fre (frequency):
Frequency signals to be evaluated are applied at the
input with this description.
Dir (direction):
You use this input to set the direction in which a counter
should count, for example.
En (enable):
This input enables the function of the block. If the input
is at “0”, other signals are ignored by the block.
Inv (invert):
The output signal of the block is inverted when this input
is activated.
Ral (reset all):
All internal values are reset.
Connector X at the inputs of the special functions
If you wire inputs of special functions to the x connector,
these inputs will be assigned the value 0 i.e. a low signal is
applied to the inputs.
LOGO! Functions
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